Lake Byron — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Byron, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Byron today is 18.2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| SEP 16 | 19.8°C | 21.5°C | |
| SEP 17 | 19.5°C | 21.5°C | |
| SEP 18 | 18.5°C | 21.5°C | |
| SEP 19 | 18.8°C | 21.5°C | |
| SEP 20 | 18.6°C | 21.5°C | |
| SEP 21 | 18.4°C | 21.5°C | |
| SEP 22 | 18.8°C | 21.5°C | |
| SEP 23 | 18.2°C | 21.5°C | |
| SEP 24 | 21.5°C | 18.4°C | |
| SEP 25 | 21.5°C | 18.5°C | |
| SEP 26 | 21.5°C | 18.7°C | |
| SEP 27 | 21.5°C | 18.9°C | |
| SEP 28 | 21.5°C | 19.0°C | |
| SEP 29 | 21.5°C | 19.2°C | |
| SEP 30 | 21.5°C | 19.4°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 1°C | 7°C | 12°C |
| February | 1°C | 8°C | 15°C |
| March | 0°C | 9°C | 17°C |
| April | 3°C | 12°C | 20°C |
| May | 8°C | 15°C | 23°C |
| June | 15°C | 20°C | 24°C |
| July | 17°C | 23°C | 29°C |
| August | 20°C | 24°C | 29°C |
| September | 17°C | 22°C | 26°C |
| October | 5°C | 12°C | 18°C |
| November | 3°C | 7°C | 10°C |
| December | 2°C | 7°C | 11°C |
Lake Byron: Water Temperature by Location
Lake Byron: Weather Forecast
September 23
September 24
September 25
September 26
September 27
Location & Local Information
Lake Byron’s surface temperatures follow the typical seasonal pattern of prairie lakes in eastern South Dakota. In spring (April–May) the water usually runs cool, roughly 40–62°F (4–17°C) as the lake mixes and warms. By early summer (June) temperatures commonly rise into the upper 60s to mid-70s °F, and peak in July and August around 70–80°F (21–27°C) at the surface on warm, sunny days. In early fall (September–October) temperatures decline back toward 50–64°F (10–18°C) as air temperatures drop, and in winter the lake surface typically freezes or hovers near 32°F (0°C) under ice cover.
Swimming is generally possible at Lake Byron during the warm months when surface temperatures are comfortable, and public access points or private shorelines are used for recreation. Local rules, posted signage and water-quality testing determine whether beaches are open; blooms of algae or elevated bacteria levels can lead to temporary advisories, and cold or windy conditions can make even summer water feel chilly. For safety, swimmers should heed posted guidance, be aware that shallow areas warm faster than deep spots, and avoid entering the lake when ice is present in winter.